16 results about "Focal plane detector" patented technology

The application belongs to InGaAs infrared focal plane detector, and provides a preparation method of a new type of InGaAs short-wave infrared detector. After growing P electrode, N electrode, P type metal and N type metal to form ohmic contact, growing connecting layer metal, thinning and polishing InP substrate to form a flat mirror surface, corresponding photoetching on a readout circuit wafer, growing lower electrode metal and indium column, and then carrying out metal stripping; InP epitaxial wafer PDA and readout circuit are uniformly glued, protected, and diced to form independent single; PDA and readout circuit are inversely interconnected to form an infrared detector, and secondary polishing treatment and growth of anti-reflection coating are carried out. The indium column is grown at the end of the readout circuit, and one-step photoetching can be completed. The PDA chip end can reduce the growth of the lower electrode, the growth of the indium column, and the growth of the corresponding passivation layer and the opening of the passivation layer. The process steps are reduced, the probability of defects is reduced, the production cost is reduced, and the final yield of the product is further improved.

The application provides an avalanche photodiode focal plane array pixel gain simulation method and device, the method comprises the following steps: respectively under dark field conditions and light field conditions, a varying bias voltage is applied to an avalanche photodiode focal plane array, and a dark current response curve and a photocurrent response curve of an anode current of a pixel unit in the focal plane array are obtained respectively; under different bias voltages, a signal difference between the dark current response curve and the photocurrent response curve is extracted, and the pixel gain of the pixel unit is determined according to the signal difference. The pixel gain simulation method provided by the application can accurately obtain the pixel gain and is suitable for a silicon-based APD focal plane detector array with different pixel unit structures. In addition, the method can reveal the influence of internal electric field distribution changes caused by factors such as bias voltage on the array gain, thereby providing a theoretical basis and technical path for device optimization design in actual application scenarios.

The embodiment of the present application discloses an infrared focal plane detector, a preparation method thereof and a plane detection device. The infrared focal plane detector comprises a substrate, a readout circuit layer and a detection layer which are stacked on the substrate. The readout circuit layer comprises readout circuits of each detection unit. The detection layer comprises a first electrode, a second electrode which is oppositely arranged with the first electrode, and a photoelectric conversion layer which is arranged between the first electrode and the second electrode. The first electrode comprises a first functional layer which is arranged on the readout circuit layer and a second functional layer which covers the first functional layer. The first functional layer of each detection unit is electrically connected with the readout circuit, and the first functional layer comprises a plurality of openings which penetrate through the first functional layer. The embodiment provided by the present application increases the light transmittance on the basis of ensuring the conductivity of the first electrode, effectively improves the imaging quality of the infrared focal plane detector, and has practical application value.

The application discloses a superconducting quantum capacity detector with large saturated power, which comprises a reference ground, a coplanar waveguide transmission line, a superconducting microwave resonator based on a tantalum film and a single Cooper pair box based on aluminum, the superconducting microwave resonator comprises a double helix inductor and an interdigital capacitor, the single Cooper pair box is connected to the interdigital capacitor through aluminum metal wires, the single Cooper pair box and the double helix inductor are located on the same side of the interdigital capacitor, and the single Cooper pair box is located above the double helix inductor, so that the detector unit is more compact, the space utilization is increased, and the number of pixels of a multi-pixel focal plane detector array is increased; the gate capacitor is designed in the shape of a tuning fork, compared with an existing parallel wire structure, double capacitance values can be obtained without increasing the volume of a superconducting island, the smaller the volume of the superconducting island is, the more significant the quantum capacity effect of the detector is, and the more obvious the response is, the larger the gate capacitor is, and the larger the saturated power of the detector is, so that the saturated power can be increased without losing sensitivity.

The application relates to the technical field of scanning laser radar, and discloses a compact scanning laser radar optical system, which comprises a laser emission optical module for emitting a laser beam, a laser receiving optical module for receiving reflected laser after the laser beam is diffusely reflected by a target object, the laser receiving optical module comprises a half-pentagonal prism and a receiving cylindrical mirror, and the receiving cylindrical mirror is provided with a first included angle with the normal of the optical path of the reflected laser; the reflected laser is sequentially imaged to a focal plane detector module after passing through the receiving cylindrical mirror and the half-pentagonal prism, the focal plane detector module comprises a cylindrical reflection strip group, the cylindrical reflection strip group is used for reflecting deviated reflected laser, and the laser emission optical module, the laser receiving optical module and the focal plane detector module are assembled in a cup-shaped column cover. The application can improve ranging precision while simplifying the structure and compacting the volume.

This invention discloses a multispectral polarization imaging system and data processing method based on a filter wheel. The system includes a four-channel polarization imaging system, a filter wheel system, and a main control unit. The four-channel aperture-differentiated polarization imaging system is arranged in a 2×2 array, containing three linear polarization channels and one circular polarization channel, achieving full Stokes vector imaging. The filter wheel system is located between the imaging lens and the detector, and uses a motor to switch between single-channel and three-channel bandpass filters, combined with a color focal plane detector to achieve multispectral scanning. The main control unit controls synchronous exposure and processes data. The data processing method includes raw data preprocessing, multispectral data recovery (processing separately for single-channel and three-channel bandpass filters), channel registration, and polarization information extraction. This invention can simultaneously acquire multispectral and full polarization information, and its modular design makes it easy to operate and flexible to use.

The present application relates to a kind of non-refrigeration infrared focal plane detector micro-bridge structure cleaning method, comprising the following steps: using the solution containing hydroxylamine is carried out spray soaking and cleaning;Using isopropanol solvent is carried out spray soaking and cleaning;Using deionized water is carried out spray soaking and cleaning;Using isopropanol solvent is carried out spray soaking and cleaning;The pressure of spray is 0.2Mpa to 1Mpa.The non-refrigeration infrared focal plane detector wafer after cleaning is dried.The present application is by using the method that spray and soaking work cooperatively, ensure the integrity of micro-bridge structure while also ensure the environment of cleaning.

This disclosure relates to the field of infrared detection technology, and more particularly to a colloidal quantum dot infrared focal plane detector. The colloidal quantum dot infrared focal plane detector includes a colloidal quantum dot infrared detection chip and a window located on one side of the light-incident surface of the colloidal quantum dot infrared detection chip. Specifically, by setting the window as an anisotropic structure window, the anisotropic structure window includes a first surface and a second surface. The first surface is located on the side facing the colloidal quantum dot infrared detection chip, and the second surface is located on the side facing away from the colloidal quantum dot infrared detection chip. At least a portion of the first surface and / or the second surface has an angle greater than 0 with the light-incident surface of the colloidal quantum dot infrared detection chip, thereby breaking the light path of reflected light in conventional window structures. This prevents the reflected light from forming a coherent beam with the incident light, thus improving the interference fringe phenomenon and enhancing the imaging quality of the colloidal quantum dot infrared focal plane detector.

The application belongs to the technical field of InGaAs infrared focal plane detector, and particularly provides a preparation method of an InGaAs short-wave infrared detector. First, primary grinding and polishing are performed on an InGaAs epitaxial wafer with a lower electrode to obtain a smooth mirror surface, then indium columns are grown, and the wafer is sliced and cleaved into independent PDA chips; flip-chip interconnection is performed with corresponding readout circuits; the flip-chip soldered chips are thinned and polished again, and an anti-reflection coating (ARC) is grown at the PDA chip end to improve the quantum efficiency of the detector. The infrared detector prepared by the method can greatly reduce chip surface scratches and other pollution, and improve the performance of the infrared detector.

The utility model relates to multi-slit push-scan type hyperspectral imaging system, including front objective lens, multi-slit element, spectrometer imaging subassembly and panchromatic focal plane detector, multi-slit element sets up in the imaging light path of front objective lens, multi-slit element includes rectangular window and multiple parallelly arranged slits, and the rectangular window department sets up filter, spectrometer imaging subassembly respectively receives the light that transmits from rectangular window and slit and handles after, focuses to panchromatic focal plane detector again, panchromatic focal plane detector gathers the light after spectrometer imaging subassembly processing, forms spatial image and spectral data, realizes the errorless splicing and fusion of spectral image according to the position and attitude change in spatial image continuous two frames, obtains the spectral image of high spatial resolution, high spectral resolution. The utility model front lens, the joint design of multi-slit element and spectrometer imaging subassembly obtains the optical system that spectrometer imaging performance is excellent, and the volume is small, and the signal-to-noise ratio is high, and the image acquisition rate is high.

The application discloses an infrared focal plane array modulation transfer function testing device and method, which comprises an infrared light source, a knife-edge target, a manual rotating table, an imaging optical system, an infrared focal plane array detector, a three-dimensional displacement mechanism, a driving and data acquisition system and a control computer; the infrared light source comprises two light sources of a surface source black body and an integrating sphere, the surface source black body is used for testing a focal plane detector in a mid-infrared and far-infrared response band, and the integrating sphere light source is used for testing a short-wave infrared focal plane detector; the knife-edge target is installed on the manual rotating table, the imaging optical system is located between the knife-edge and the infrared focal plane array detector, the infrared focal plane array detector is arranged on the three-dimensional displacement mechanism, the driving and data acquisition system is connected with the infrared focal plane array detector and the control computer respectively, and the control computer is also connected with the three-dimensional displacement mechanism and the infrared light source respectively. The application has the advantages of wide application, convenient testing, comprehensive testing parameters, high testing accuracy and the like.

A high-detection-efficiency long-wave infrared spectral imaging device and method, belonging to the field of micro-nano optical design, is disclosed. The scheme is as follows: a metasurface spectral modulation layer is composed of a square array of multiple metasurface periodic units arranged sequentially. Each metasurface periodic unit consists of multiple metasurface structural units, and each metasurface structural unit includes a substrate and several nanopillars. The nanopillars are distributed on the substrate in a C4 symmetrical structure. A particle swarm optimization algorithm is used to reverse-engineer the high-transmittance metasurface structural unit and obtain its structural parameters. Incident light is spectrally encoded by the metasurface spectral modulation layer. The encoded information is converted into electrical signals by the long-wave infrared focal plane detector pixels below. Combined with a deep neural network algorithm, a high-resolution long-wave infrared spectral image can be reconstructed. The spectral imaging method provided by this invention is perfectly compatible with semiconductor and MEMS processes, achieving high-detection-efficiency long-wave infrared spectral imaging.

This invention discloses a design method for the thermal control system of a primordial gravitational wave detection telescope, belonging to the field of primordial gravitational wave detection technology. The method includes: S1. Preliminarily determining the receiver's main structure, materials, and connection methods based on the detection target; S2. Analyzing system heat leakage and determining the cooling power of the refrigerator; S3. Establishing a thermo-structure coupling model using Comsol and performing temperature field and thermal deformation simulations; S4. Comparing the simulation results with design specifications, and iteratively optimizing if not met; S5. Determining the final thermal control implementation scheme. This invention, through systematic thermal design and multiphysics simulation iteration, effectively reduces system heat leakage, ensures stable operation of the focal plane detector within the 100mK temperature range, and meets structural stress and optical path accuracy requirements, providing a reliable thermal control design method for primordial gravitational wave detection.

A device and method for recording spectral information of charged particle beams, such as ion beams, or of light beams, at a high resolution. Specifically, a mass spectrometer having a focal plane detector. The device and method enable the recording of mass spectral data at both high mass resolving power and mass accuracy, during parallel acquisition of potentially the entire spectrum of a sample beam.